Does anyone know of a social website where native French language speakers will correct phrases or texts for free?, i.e. for reputation points and badges etc. like at StackExchange?
For example, as I ...

I noticed during the last days that Twitter adds a “translation” from Bing Translate to tweets when I expand a tweet in the web interface. This happens even on my own tweets.
Is there a way to turn ...

Do you know any collaborative translation tool?
I've seen the suggestions in this answer, but I'm specifically searching for a tool to translate books (so large documents made of paragraphs, mostly), ...

I want to translate Facebook to languages I speak on a daily basis, and it says that I need to be a user on Facebook for a defined period of time before I'll be able to translate the website, but it's ...